Ps Vita Back Touch Pad

Hey,

I just had a question regarding the back touch pad of the both Vita versions. I've heard that the 2k version has a much smaller one compared to the 1k. Especially to those owning both: Do you guys sometimes notice that/are you annoyed (or maybe even happy) about that? I am still deciding whether I want to get a 1000 or a 2000.

Thanks for any Info in advance!