Intel Core i7 2.0GHz Quad-Core Processor or Intel Core i7 2.7GHz Dual-Core Processor?
 

Intel Core i7 2.0GHz Quad-Core Processor or Intel Core i7 2.7GHz Dual-Core Processor? for protools

Re: Intel Core i7 2.0GHz Quad-Core Processor or Intel Core i7 2.7GHz Dual-Core Proces
 

4 x 2.0GHz = 8

2 x 2.7GHz = 5.4

Not quite as simple as that, but I'd put money on the quad core system being faster.

Re: Intel Core i7 2.0GHz Quad-Core Processor or Intel Core i7 2.7GHz Dual-Core Proces
 

Are you sure that PT will run safely and without any problems on a quod-core Notebook, too?

Re: Intel Core i7 2.0GHz Quad-Core Processor or Intel Core i7 2.7GHz Dual-Core Proces
 

Yes. It runs well on Quad core processors. One recommended setting is to set your playback engine to use one less processor core that you have to leave a processor free to handle system functions and non-realtime plugins. In a dual core processor system that means you set it to only one (50% or your processor available to the playback engine). On a quad core processor system you set it to three (75% of your processor available to the playback engine).