I use the standard OEM slide release on most of my Glocks except for 20. On the larger frame gun the extended 34/35 lever makes it a bit easier to reach. I've noticed that the release is a bit harder to press on my 43. Probably in part be used its new but it also seems a bit more difficult to get my hand in the right position for leverage on such a small pistol.
I'm thinking of trying the Vickers release but Ive never actually handled a pistol so equipped. For those who have, especially on the 42/43, how much difference does it make? I find that the factory extended lever is too long for me on the 17/19 causing my thumb to contact it during recoil.