The 15.6 inch display and then I'll change the stock slow HDD for my current favorite Hybrd 7200RPM 750GB drive to kick up the speed.
The Lenovo's sometimes swap the Ctrl and Fn keys so for me that's a deal breaker.
$610 - Toshiba Satellite L855-S5383 Notebook PC - 8GB, Intel Core i7-3630QM 2.4GHz, 8GB DDR3, HDD 5400rpm, 15.6" Display (PSKFUU-02X003)
$655 - Lenovo IdeaPad Y480 - 8GB, Intel Core i7-3610QM 2.3GHz, 8GB DDR3, HDD 5400rpm, 14" Display
I will be doing a lot of coding and development - Eclipse, Android SDK, etc. together with 15 browser windows. I don't care about hard-drive capacity because I have an SSD which I will replace with. The Toshiba has a better processor and is slightly cheaper. I cannot reliably find the weight of the IdeaPad. Battery life is sort of important. Display is also sort of important.
One big question is that I plan to use the laptop for about 3 years. Is the Toshiba likely to break / die? I do trust that the Lenovo will not.
Any other factors I should use to decide? Thank you.