I have Ben Cowan, Ben Sarek, Titania and Tiben. The Ben series are shorter plants, about 1/2 the height of Titania (tiben is too young to say). Sarek is fairly spreading with canes falling to the sides while Titania and Tiben are more upright.

Last year my Ben Sarek produced 1097g. 12 Brix.

Titania planted right next to Sarek produced 2576g. 15 Brix.

So Titania took up less side-to-side space, was about 2x as tall and produced over 2x the fruit and the fruit was 15 brix vs 12 and the berries were a bit larger on Titania.

Even at 15 brix it was not something that I wanted to eat fresh but for syrup, jams and the like both were good.

For plant form and productivity I would plant Titania over the Ben series. Tiben is still to early to tell, this year and next will give me more info.

See my "Backard" report for photos and more info.