SRT8 vs R/T (cost vs options)

I'm looking at getting a new ( new to me ) Hemi car ( magnum or charger ) within the next year. I know it's a little early to start looking but I like to do my research.

Sooo, the question is this:
Do the added features of the SRT really add up to the extra cost?

I'm familiar with the selling points of the SRT vs RT, for example "high performance suspension" vs " performance suspension", but what EXACTLY does that mean?

I'm hoping for technical details as well as owner feedback.