I went to install the new Sylvania bulbs in one of my bathrooms (9 bulbs). They didn’t fit in the fixtures. They would not screw in enough to engage the power contacts because the heatsink touched the reflectors in the fixture. The old bulbs curved inwards toward the base. The new ones start at the base and curve outwards towards the LEDs.
Luckily as part of the replacement bulbs, were 9 Ecosmart bulbs that fit just fine. They were 350 lumen bulbs and the Sylvanias were 450 lumen bulbs.