I compared prices of Trader Joe's items to those of Whole Foods 365 Everyday Value - here's what I found

Trader Joe's: $2.29 per half-gallon

Whole Foods 365: $3.99 per half-gallon

Milk at Whole Food's was noticeably pricier. If you went through a half-gallon of milk a week, you'd be saving about $90 a year if you shopped at Trader Joe's.

Note that the Whole Foods milk is organic.

Trader Joe's: $2.99 per half-gallon

Whole Foods 365: $3.69 per half-gallon

If you're more of an almond-milk person, shopping at Trader Joe's would save you about $35 a year if you went through one carton a week.

Note that Whole Foods' almond milk is organic.

Trader Joe's: $2.29 per half-gallon

Whole Foods 365: $2.99 per half-gallon

As with almond milk, you'd save about $35 a year if you shopped for OJ at Trader Joe's, assuming you went through a carton a week.

Trader Joe's: $2.99 per 8-ounce bag

Whole Foods 365: $7.99 per 12-ounce bag

While Whole Foods' bag of cheese was bigger, there's still a significant price discrepancy. The Whole Foods 365 Gouda comes out to about $5.33 for 8 ounces.

Note that Whole Foods' Gouda is organic.

Trader Joe's: $3.99 per 12-ounce bag

Whole Foods 365: $4.99 per 12-ounce bag

Cheese was one of the noticeably more expensive products at Whole Foods. Trader Joe's was a clear winner across the board.

Note that Whole Foods' cheddar is organic.

Trader Joe's: $3.29 per 7-ounce package

Whole Foods 365: $5.99 per 6-ounce package

The other large price discrepancy I noticed was between meat. There weren't too many 365 Everyday Value meat options to begin with. If you bought a package of turkey each week for a year, you'd spend $140 more shopping at Whole Foods — and you'd have 52 fewer ounces!

Note that Whole Foods' turkey is organic.

Trader Joe's: $1.99 per 8-ounce container

Whole Foods 365: $2.19 per 8-ounce container

Surprisingly, the price difference between hummus was essentially negligible.

Trader Joe's: $2.99 per pound

Whole Foods 365: $3.49 per pound

While there was a $0.50 difference between the two options, a pound of butter can last a while — if you went through a box every two weeks, you would only save $13 over the course of the year by shopping at Trader Joe's.

Trader Joe's: $1.49 per dozen

Whole Foods 365: $3.49 per dozen and a half

At Whole Foods you'll get the best value with the 18-count egg carton; it comes out to about $2.33 per dozen. But your best bet is heading to Trader Joe's, where the eggs are reliably $1.49 (or 12 cents an egg!).

Note that the Whole Foods eggs are cage-free.

Trader Joe's: $5.99 per 64-ounce container

Whole Foods 365: $5.99 per 56-ounce container

You'll get slightly more bang for your buck at Trader Joe's, but not much.

Trader Joe's: $1.99 per 5-ounce bag

Whole Foods 365: $1.99 per 4-ounce bag

You'll get just one more ounce of lettuce with your $2 at Trader Joe's; plus, the Whole Foods bag is organic.

Trader Joe's: $1.49 per pound

Whole Foods 365: $1.69 per pound

The frozen vegetable prices varied depending on veggie, from $0.99 to $1.99. Trader Joe's tended to be cheaper, but not by much.

Trader Joe's: $4.49 per pizza

Whole Foods 365: $3.99 per pizza

Trader Joe's did offer one pizza for $3.99 (the arugula pizza), but all the other frozen pizza options were $4.49 or $4.99. Whole Foods, on the other hand, offered options for $3.99.

Trader Joe's: $1.99 per 16-ounce jar

Whole Foods 365: $2.49 per 16-ounce jar

Trader Joe's now offers a $1.99 jar of peanut butter, but the popular spread is affordable at both chains.

Trader Joe's: $3.29 per 16-ounce bag

Whole Foods 365: $3.49 per 16-ounce bag

Peanuts are one of the cheapest nuts out there — you can get them for essentially the same price at the two supermarkets.

Trader Joe's: $6.49 per 16-ounce bag

Whole Foods 365: $7.99 per 16-ounce bag

While the price discrepancy between peanuts was nearly negligible, if you're buying almonds, head to Trader Joe's.

Trader Joe's: $2.49 per 18-ounce container

Whole Foods 365: $3.19 per 18-ounce container

Trader Joe's also offer a bigger, 32-ounce bag of rolled oats, which comes out to about $2.24 per 18 ounces.

Trader Joe's: $2.99 per 20-ounce box

Whole Foods 365: $2.99 per 16-ounce box

You'll get four more ounces of cereal at Trader Joe's with your $3.

Trader Joe's: $1.99 per 8-ounce box

Whole Foods 365: $2.29 per 8-ounce box

Cereal bars were also similar in price.

Trader Joe's: $1.99 per 5-ounce bag

Whole Foods 365: $2.29 per 6-ounce bag

Whole Foods popcorn is slightly cheaper; five ounces would cost about $1.90, compared to $1.99 at Trader Joe's.

Trader Joe's: $1.39 per 18-ounce jar

Whole Foods 365: $2.99 per 25-ounce jar

While the Whole Foods jar is slightly larger, it still costs more per ounce; 18 ounces of the Whole Foods 365 marinara sauce would be about $2.15.

Note that the Whole Foods marinara sauce is organic.

Trader Joe's: $0.99 per pound

Whole Foods 365: $1.09 per pound

No matter where you shop, pasta will always be one of the most economical options.

Trader Joe's: $5.99 per 17-ounce jar

Whole Foods 365: $6.99 per 17-ounce jar

Olive oil tends to be on the pricier side no matter where you shop, but you'll save a buck at Trader Joe's.