Hi
You have to post the model of the DELL - Inspirion 15 i3 is not acurate
Any way - you can use this site to check you self :
http
/www.notebookcheck.net/
Toshiba Satellite C50 Series - Average Score: 60% - poor
http/www.notebookcheck.net/Toshiba-Satellite-C50-Series.102216.0.html
Toshiba Satellite L50 Series - Average Score: 65% - average
http/www.notebookcheck.net/Toshiba-Satellite-L50-Series.101260.0.html
Toshiba Satellite Pro L40 - Average Score: 75% - good
http/www.notebookcheck.net/Toshiba-Satellite-Pro-L40.5786.0.html
Dell Inspiron 15-3521 - Average Score: 76% - good
Inspirions are mid-range laptops
Poor quality but verry good specs - if you intend to game it`s very probably to choose the DELL
Also the toshiba L40 is quite good
Use the link i`v send you and try to find Laptop Review for the laptop you`r about to choose !
Good luck