HTC does have a strong radio...I often see my TB pull in a signal as good as my wife's Droid X. In fringe area's though, her Droid wins every time.
Also, you cannot say that the S3 will be the same - the radio is totally different than any other Samsung VZW has ever carried. The track record does not look good...I admit. But things are a lot different with the S3...only time will tell how it performs, not previous Samsung phones.
Here is a little more info about why
Moto has the best radio and just general cell stuff too: "Motorola has been doing this for a long long time. They basically invented the mobile phone. I'm sure they have guys on the team that can code radios in their sleep. They have also patented everything. They had a 10 year head start (at least) in making a phone work with a mobile network.
That's where the RIL comes in
http://en.wikipedia....Interface_Layer this is how the software and other pieces of hardware talk to the radio chip which tells the network whats happening ie making a phone call, looking at naughty things on my browser. No 2 RIL would be the same. Razr and Razr Maxx excluded.
You need strong hardware which qualcomm does a pretty good job of doing but you also need the software to be able to talk to both the network and the hardware of the phone and do it well."