[T-Mobile Samsung Galaxy S II SGH-T989] Cynagen:
I'd like to take some time out and possibly fork off from this thread in order to generate comparison charts for each radio for my area. Document my processes, then provide them so others can follow the directions exactly so that we can get some objective results and real-world numbers down on paper. So far, I've tested a couple radios in my area, the stock 4.0.3 radio (UVLE1) that I got (I bought my SGS2 lightly used and the guy did me a favor and Kies it for me), UVLG3 (GNote), UVLH1, and UVLI1. Below are my initial impressions, not the actual test results, those will be provided later.

UVLE1: Plenty responsive, however page loads, content acquisition such as images and video sometimes take a bit. Pings are reasonable.

UVLG3: This is the Galaxy Note (SGH-T879) radio, and it's my DD baseband in the Phoenix Metropolitan area because out here we don't have HSPA+ DC (dual-channel) aka 42mbps, we only have 21mbps. Pings are fine, what I would expect from cellular, and this radio lets me pull that full unfettered 21mbps whenever possible, the upload is reasonable 3-4mbps tops, I believe this radio sacrifices upload throughput for faster/more responses to download in order to maximize the download speed, which would completely make sense on a device like the Galaxy Note. There is a bug however with this radio, in that it takes sometimes too long for apps on my phone to get a connection and they will repeatedly fail on the first attempt for internet connectivity and have to be retried. A minor annoyance in my book but for some this may be a deal breaker.

UVLH1: This was my previous DD, however I got pretty standard pings (roughly the same as the LG3 radio), but much less download throughput, typically I would top out at about 17-18mbps no matter where I was, spikes up to 20. Upload was higher and consistent, around 5-6mbps.

UVLI1: I only tested this radio so far as to get the process down for how I would like to see these objective tests run and a little bit of normal playtime. Holy crap the pings are INSANE on this radio... the response time is there, however, again as I've seen from T-Mobile's cellular tuning, they've nerfed the speeds again, average download 16mbps or so, upload was okay but fluctuates 3-4 low end, 5-6 top end.

Here's a sneak peek at my official test results as obtained with Speedtest.net from my home about half a mile from the tower during off-peak (11pm on a weeknight). I ran the speedtests each 3 times on each radio, the results do not reflect my top numbers by any means as I was inside, not outside, and subject to the effects of radio TDR (wikipedia.org) and the old construction of my building with lots of iron & copper to screw with my cellular signal, this is especially reflected in my upload speeds as seen below.

UVLI1: (P=Ping, D=Download, U=Upload)

P: 63ms; D: 9.9mbps; U: 0.67mbps

P: 71ms; D: 9.41mbps; U: 0.67mbps

P: 73ms: D: 7.82mbps; U: 2.56mbps

UVLH1:

P: 68ms; D: 8.33mbps; U: 0.79mbps

P: 68ms; D: 7.43mbps; U: 1.5mbps

P: 103ms; D: 8.29mbps; U: 0.69mbps

UVLG3:

P: 73; D: 15.64mbps; U: 1.72mbps

P: 88; D: 15.81mbps; U: 1.76mbps

P: 56; D: 17.30mbps; U: 3.77mbps

You can see that for the Phoenix Metro area based on my tests at least, that the UVLG3 radio for the Samsung Galaxy Note was actually the best radio for overall throughput. This is the main reason that I continue to use it despite the initial connection lag which can be fixed. It appears that each radio has different timings for Fast Dormancy, and the Note's initial startup timer is much longer than the rest, this may be because they're expecting the Note's loading times compared to my OC'd and tuned SGS2's speeds.

UPDATE: I will be reviewing these radios on video along with the 2 newly released radios for the Phoenix Metro area. See my reply post for more details!