Thank you for your help. This is what I gather from reading from RCU on this.

1. G3.5 has better graphics, more planes and fields. More ability to change parameters. More game oriented. Less demanding on CPU.

2. FS1 has lesser graphics, less planes and fields. Less ability to change parameters. More realistic in terms of how actual planes fly. A sim to buy if you want to duplicate the experience at the field so it has less gaming features. More demanding on CPU.

Am I right? DP