I've always believed Yuasa to be the best but I must admit that the last Yuasa I bought doesn't seem to be quite as well made as previous ones.
My old CB750F2 has only had three batteries in forty years (never on a tender)! The old fashioned top-up type though - which must say something. Gel type Yuasa for my CBR1000RR lasted seven years (not on a tender). The only problem has been my Triumph Scrambler which has been through three in ten years, two Yuasas and a Lucas and which have been on a tender due to it failing to start more often than not when I came to ride it.
I did find out to my cost one problem with tenders - they can mask other problems. One day I went out for a longer ride than usual without stopping, about an eighty mile round trip. Once home, unusually I needed to use the bike straight away again, when to my surprise it wouldn't start. Turned out to be a faulty rectifier. Basically nothing had been draining the battery when the bike was standing, it was riding the bike which had been draining the battery, something which had possibly been happening for years and I didn't realise because every time I arrived home the tender had been charging up the depleted battery.