I'm not a striker fired guy, but both ruger and cz are brands that I trust. I have 10 cz firearms and 13 rugers. Both have excellent customer service . Ihave had to deal with both. The base of the P10 is very similar to my 09's and 07's. All leading back to the legendary 75. The RMX is a newer design and is close to a glock format. Some like it some don't. There is some word on the street that some more left leaning states want to shut down the RMX because it is so close to the recently discontinued glocks. In the end after you have read all my opinions, and they are just that opinions, you have to deside what you want, what feels good in your hand, and what you want and feel comfortable with at the end of the day. Good luck and let us know what you decide and your thoughts.