Need help picking between 6550 and KT88 tubes

Generally, KT88 have more body/meat in the sound, but also found them much musical. Personally I compared NOS 6550 TUNG SOLS Black smooth plated and NOS GEC KT88. I also tried NOS 6550 Sylvania's, but didnt liked them that much. After all, it would be your personal choice, but after GEC KT88 nothing been better for me. Dont forget about pre-section, which is also very important, which have a huge influence in the whole. My amp was PrimaLuna Prologue Two

Forgot to mention that NOS EL34 Tesla's are great valves as well, the only EL34 I ever tried, but they sounded very good, less extended and may I say bit laid back, compared to KT88, but not in the worse way, just different. I was very impressed with them.