I'm looking at picking up a second truck for my friend that's interested in racing. Will there be radio issues running the same trucks together? I'd like to get a second Volcano EXP Pro.

Nope. Should be a 2.4 ghz radio so no problems.

Only back in in the day of am/fm radios was this a steal concern and even then there was lost of crystal options to work around

Racing and Redcat do not mix.

....but it's in the company's name.

Seriously though, there are all kinds of "racing". You just gotta look past entry fees, and points.