Rule #1 when going to a 150 from a 172:
If you are chunky, loose weight first. The 150 is a tight fit!
Otherwise, A Cessna is a Cessna. Most of the V-speeds remain constant for all single-engine aircraft.
You DID say Aerobat. Good! Another problem with the early 150's (-ought and -A models) is that they have BENCH seats that are NOT adjustable. (Also takes some getting used to).
The -150 also has a lower cruise speed and the flaps ARE like barn doors, if you extend them beyond 30*.
They also have a lethargic rate of climb (but a higher service ceiling than the 172) and two fewer seats. The OLD models also have a pull handle to activate the starter rather than the key. They transmit engine vibration, so if you plan on doing LONG cross-countries, visit the John before you fly (BTDT)