That is correct, the first photo is a USP 45 (before the upgrade) and the second photo is a P2000 (with the upgrade). The paddle is the same for either.
As far as the P2000sk, it would make a good replacement for the Glock 26. The G26 has the advantage of being able to use all of the higher capacity magazines, slightly more options that HK. But the P2k has some larger capacity options as well so unless you have a bunch of higher capacity Glock mags it's a moot point.
The P2k would be of interest in that it comes in a 40 S&W flavor. I'd like to see that offered in the P30sk as that would be my choice for a sub-compact double stack.
Nothing wrong with the G26, carried one off-duty for years. It's solid and capable. Long term durability is a toss up. They're both going to last a long time.