My mom just got the P238....it's a pretty sweet piece. I do have a couple complaints about it, though.
1) It's tricky to field strip & reassemble. See if the gun shop will let you try to compare the disassembly of both pistols
2) The P238 doesn't have a decocker. You must drop the mag, eject the chamber, then dry fire the pistol. I'm not too keen on that.
Otherwise, it seems like a great little gun. My mom really likes hers. I would imagine it's going to be more pricey than the Walther, though...