I would say your decision should come down to price. I have never flown a 152. I have flown a 172 and a Katana. The Katana is a great airplane. I learned how to fly gliders, and thus I love the stick versus the yoke. It is roomier than the 152. The Katana climbs faster than the 152. It is quicker and more responsive. It also burns less gas (which may be a big consideration considering the ever rising cost of fuel).
There is no doubt in my mind that a Katana is a better airplane with respect to performance. That is what pilots tend to look at when choosing an airplane. However, performance is second to cost in my book. I believe the 152 may be cheaper than the Katana. Since you have 60 hours, you will not need quite as many hours as a fresh student pilot. So my advice would be to choose the Katana if it is within $5-10. Maybe you can take a demo flight in the Katana and see if you like it or not. Also, be sure to check out the other school to make sure it is reputable.