I would personally pick the HK and sacrifice some of the slimness for capacity and shootability. That's just me. The others above are correct, they're both good but different choices. I can never bring myself to say "you should go with X," only what I would pick and why, because carry guns are a really personal choice as we all have different sacrifices we are willing to make and different ideas about what features we want. But again, for me it would be the HK. I live in Phoenix so I'm no stranger to heat while carrying. I don't think it's too much, but you'll have to decide which you're more comfortable with on your own.