I much prefer the PA28 as a 'going places' aircraft, but if I was hour building then saving £17 an hour would sway me back to the 152.
Your decision should take account of the age and condition of the specific aircraft you are looking at. You don't want to waste time with u/s equipment.
I don't know what the coaching involves so no comment on that aspect.
[Edited to add that the fact you are training in a Warrior right now doesn't make much difference to your choice unless the reasons you chose it for the PPL still stand?]