Does the base 13 inch MacBook Pro have better specs than this laptop - http://www.pcworld.com/product/739670/dell-xps-17-notebook.html?
That Dell laptop has better CPU (quad core vs dual core on rMBP) but that's all it has going for it.
All other specs aren't good (apart from bigger storage capacity but that's with hard drive, which is much slower)
But the MacBook has a higher clock speed so wouldn't that make it better?
Depends on your usage. If none of the Apps you use take advantage of the extra 2 cores, then in the Apps you use the much more modern dual core in the rMBP will crush the 2nd gen quad in the XPS.
The SSD alone will make the rMBP seem much faster in general usage out of the gate.
You will get decent performance from the 13" iGPU as well. Not even best GPU performance from the XPS 17 can make up for all the draw backs that would come with it.
Is there a way to check if the apps you use take advantage of 4 cores?
You can use activity monitor to check, if the app shows that it's using up to 400% (dual core, 4 threads) / 800% (quad core, 8 threads), then the app is multithreaded.
I see you have the machine I'm thinking of getting. How is it and what do you use it for?
Also what are the advantages of the rmbp over this dell http://www.dell.com/uk/p/xps-13-9343-laptop/pd?
Do you think it's powerful enough to run professional apps like simulation software and large spreadsheets?It's decent.
It's the only computer I have so I use it for everything, web coding mainly, the retina screen really helps a lot, I was using MacBook Air before and it felt cramped at times.
Do you think it's powerful enough to run professional apps like simulation software and large spreadsheets?
For simulation software, you'll be better off with a baseline 15" with quad core i7 and Iris Pro.