62g ergoclears are going to be noticeably stiffer than stock browns, but yes, they have a larger tactile bump. They're still light to press, but don't expect the same lightness as stock browns.
Sticking will be an issue on new, unused clear switches, had one or two stick on me even using 62g springs; but note that this was maybe 2 switches out of 80. Sometimes its due to a combination of wonky springs/stems, which can be circumvented by swapping one or the other . Lube will also help.
If you're using old clear stems, it should likely be fine. I've used old clear stems harvested from an old cherry g80 (probably been used for years), and haven't had any sticking problems using stock mx brown springs, or even the korean 55g springs, unlubed.