Which is better for all-day wear?

The Classic Jelly is easier for long days because there is no underwire. The Favorite gives more shape but some wearers notice the wire by evening.

Which gives more lift?

The Favorite. Its lined underwire cups shape and lift more than the wireless Jelly band.

Which fits larger cup sizes?

The Favorite lists cup sizes up to I. The Classic Jelly covers S to 6XL but does not list cup sizes.

Can I wear either under a thin T-shirt?

Yes. Both have seamless cups, so neither shows seams under fitted tops.

Is The Favorite worth stepping up to?

If you want underwire support or cross-back straps, yes. If you want wireless comfort and easy care, stay with the Classic Jelly.

Classic Jelly Wireless T-Shirt Bra vs The Favorite T-Shirt Bra

Pick the Classic Jelly if you want no underwire and a wide size range up to 6XL. Pick The Favorite if you want underwire shape, convertible cross-back straps and cup sizes up to I. The Favorite scores slightly higher with owners and uses a soft microfiber blend, but it is hand wash only. The Classic Jelly wins on easy care and inclusive sizing; both are seamless and smooth under tees.

Choose the Classic Jelly if you want wireless comfort, seamless coverage and sizes up to 6XL.
Choose The Favorite if you want underwire lift, lined cups and straps that convert to cross-back.

Prices

Classic Jelly Wireless T-Shirt Bra: $28.99 at Soft Intention (checked today)
The Favorite T-Shirt Bra: $45.00 at Bare Necessities (checked today)
Difference: the Classic Jelly Wireless T-Shirt Bra is $16.01 cheaper than the The Favorite T-Shirt Bra today