No, the nickle ones.
I also play Detroit Strings SS wirewounds from webstrings.com - they stay bright for quite a long time also and I have not seen excessive fretwear with them. I get maybe a week of staying bright from Rotos.
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Cool to see someone else using Webstrings - I haven't tried the rounds, but I swear by their flats!
btw, not a thunderbird owner, but I am GAS'ing for an Epi Classic IV right now, if that counts. Why do I have to be so poor?

My Fender Jazz Special has a great feeling neck as well, but that bass is just an overall great player.