I've logged around 150 hours in each and can tell you that the conversion will be amazingly simple. Here are a few things to take note of.
1. 152 has cross-feed tanks so there's no need to switch tanks on cross-country. It also has no fuel pump.
2. 152 is more like a toy, so it's much more responsive to control inputs.
3. 152 is much lighter so you'll get bounced around more in the wind and with thermals.
4. 152 will not give you the excessive float when landing that the Warrior does.
5. IMPORTANT: The Warrior is spin resistant. The 152 is not! Watch your airspeed in the pattern. And be careful when doing practice stalls or you can get yourself into a spin.
Hope this helps. Enjoy!
and a p.s. to Maude Charlee...KMA. They're both fun planes to fly!