Sony uses wet lubricant on their tapes, Panasonic uses dry lubricant. Neither is flat out better, but when you start with one never use the other.
Yes, I was going to say that it was certainly a potential problem in the early days of DV, but became a non-issue the best part of 10 years ago! I've been running different brands of mini-DV tape (mostly Sony, Panasonic and Maxell) in the same camcorder for years and have never had a problem.The dry/wet lub problem is a thing of the past (the companies have used compatible lubricants for years now)