Tube Brands reccomended for Jadis DA-60


I understand the different characteristics between 6500, KT-88, and KT90s - though I am wanting to know the difference between the different tube manufacturers.

Ideally to find out what brand Jadis uses to put their private label on - or alternatively someones first-hand success story with a particular brand.

Thanks
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Jadis KT-88's which are stock on currently shipped DA-60's (which I happen to own) are JJ(Tesla)brand made in Czech Republic.

Tube Brands reccomended for Jadis DA-60
I understand the different characteristics between 6500, KT-88, and KT90s - though I am wanting to know the difference between the different tube manufacturers.

Ideally to find out what brand Jadis uses to put their private label on - or alternatively someones first-hand success story with tubing a DA-60.