simple question about Laptop

If the settings are high and running addon aircrafts and using:1GB (2x512) 667MHz dual-channel DDR2 SDRAM Memory256MB NVIDIA® GeForce Go 7800100GB SATA (7200 RPM) Hard Drive1. Are there any big differences between a Intel® Core Duo Processor T2400 1.83 Ghz and a Intel® Core Duo Processor T2600 2.16 Ghz?2. Can a Intel® Core Duo Processor T2400 1.83 Ghz laptop get a framerate greater than 10fps, is it worth to get a 2.16 CPU?-------------------------------------------------3.Are there any great differences between 1GB Ram and 2GB Ram in performance?-------------------------------------------------Thanks