I would think that the iPad would be better for your intended purpose.

However, based on my experience, I would not recommend Umobile.

I have tried Digi Discover Day, Umobile (postpaid) and Hotlink and the best in terms of speed, reliability and coverage, Maxis is still the best (but priciest though).

Digi gave me download speeds of not more than 0.9Mbps (ping was also terrible). With Umobile, I experience pretty bad speeds with ping of upto 5000++ ms but download speeds can be upto 3Mbps. Hotlink gives download speeds of 2-3Mbps (occasionally upto 6Mbps) and ping is 60ms to 80ms.