I think one antenna might work better than another depending on your location. Most of the towers are either 46 or 50 miles from my location. In my case the less expensive SR-100 worked better than the ST-2.
Another antenna that often works surprisingly well indoors is the simple dipole antenna that comes with many tuners.
You can also try combining them. For example, I took an inexpensive coax adapter with two screws on it and connected the two terminations for both the SR-100 and the dipole antenna to it.
I have a roof mounted antenna and have it pointed towards the stations that are in Seattle.
My Onkyo T-9090 supports two antennas and for some of the local stations, the combined indoor antennas pulled in stations better.