That's the same guy. I vividly remember the navy blue hull, but he passed me too fast to see his transom. His vessel name came up on AIS, and also was verified by the MMSI database.
I was running OpenCPN at the time, which has a really nice plugin that records an entire stream of NMEA data (your boat, all other boats, plus depth, wind, and any other instrumentation). Then you can play it back later, showing all boat locations on the screen as they move relative to each other. It will even replicate any alarms that went off. Unfortunately, you need to set it to record ahead of time, and I didn't have time to do that. (There have been times in the past when saw an interesting flotilla approaching, or something similarly noteworthy, that caused me to turn on the record function).
However, I did have the presence of mind to save his cached AIS track a few minutes after he passed me (more frequent points than marinetraffic.com), and I also had captured my own GPS track. So I brought these up tonight to see if my recollections were accurate. I've overlaid the two tracks in the below pic. You can clearly see the little dodge maneuver I did to attempt to turn into his wake after
he had passed me. You can also see in the blowup at the bottom that he passed me 16.3 meters away, which is 54 feet. So I was not exaggerating. I did apparently exaggerate his speed, though. I said 26 knots, which I saw that he was doing after he passed me (when I brought up the AIS target info). At the exact moment that he passed me, he was only doing 24.2 knots. I guess he must have slowed down for me.