Towneplace - full kitchen(ette), appliances not as nice as Residence Inn. Room smaller than Residence Inn, but larger than normal hotel room. For longer stays, you don't get full time housekeeping.

Springhill - Wetbar with microwave and mini-fridge. Next to wetbar will be a desk, next a couch & TV, next the bed. Vanity outside of bathroom. Room smaller than Residence Inn, long and narrow. Full time housekeeping.

Residence Inn - Largest suites of the bunch. Optional separate bedroom, which I haven't seen in the others. Full kitchen(ette). Full housekeeping.

The Springhills I have been in have actually had nicer furnishings than the Towneplaces. I don't know if that is an anomaly or not.