Actually you are quite ill informed, yes in 2003 the hp was rated 215, in 04 like mine it went up 230, got lsd, suspension changes, and new tires. However there is no real increase as the srt-4 dynos at 225-235whp stock, compared to the crossfire at 170ish whp. I'll use magazine stats as you seem to be fond of them. There is no "might" not out accelerate, from Motortrend srt-4 ran a 13.8@102.7 and the crossfire ran a 14.7@94.0, that would be saying the srt-4 "may not" out run a C6. there is no may, it will. 0-60 is 5.3 for the srt-4 and 6.7 for the crossfire. Those performance numbers are from a 6-speed not even going to bother with an auto. lol Also the srt-4 braked from 60' in 112ft while it took the crossfire 113ft, the roadster is worse at 121, and the srt-4 slalomed at 68.3 and the crossfire was 66mph. Also the srt-4 gets better gas mileage. And as far as refinement, dash wise and interior quality okay, gotta love silver paint. But the shifter and clutch is money in the srt-4 and we all know how everyone feels on the crossfire's combo. The ride is better in the srt 4 as well as the seats are more comfortable. While it does this for 15k less in sticker price.
That's a pretty good argument if you ask me. Yes its loud, but I have owned v-8's that makes this thing sound quiet, so it does not bother me. Then you have a huge after market, there is a video of a srt-4, beating a E46 m3 on a the road course. The srt-4 had coilovers, along with some other tid bits. When they get coil overs they are a force to be reckoned with.

I couldn't find any g's numbers but i know they were both in the high .8's