A 1050 (Mobile) is about 40% faster than a 960M, no overclock will ever achieve close to the same speed, most overclocks are 10% increase over the base or LESS in most cases.
Pascal is performing VERY well in laptops as opposed to older generations when compared to the desktop version. If we were talking desktops a 960 would still beat out a 1050 by over 20%. but the difference between a 960M and a 960 is almost 100% difference. The difference between a 1050 (Mobile) and a Desktop 1050 is like 10%.