Yes, it is a mobile broadband sim. I was paying £20.26 per month for 15GB on a 30 day rolling contract which I thought I would have to cancel and start the new contract with a new sim. However, I was contacted by EE on my phone within a few hours of signing up online and was upgraded almost straight away to the new tariff retaining my original sim. So yes, the new deal at £14.50 for 32GB is way better than what you currently have. Just remember to apply the voucher code to get the 50% reduction.
Tony