My research reveals the i is the V3i added International languages to the menu. However, I read here that it was something else. I believe the White's Spectra V3i is still the best multi-freq. that has simultaneous freq. read out; together, with the only metal detector I am aware of that provides multi-freq. pinpoint readout simultaneously? I love mine! I will never sell it! I believe it is the only one on the market that teaches patience! It will teach one metal detecting! The build quality of the White's products, and Garrett are second to none. I could not fathom spending that kind of money only to worry if the ears on the coil would break! I also own another multi-freq. metal detector. The build quality between the two does not compare. Prior to White's closing I sent mine in, and they sent it back with a new coil free of charge, including free shipping.
C.J.M. I hope this answers your post.
Agreed about the build quality. I will miss Whites toughness. 30 plus years ago, all the detector companies built their machines like tanks. Today, everyone is demanding reduced weight. Unfortunately, plastic is thinned out and one minor drop or bang on a rock has bad consequences.