How exciting to try out new instruments (or mouthpieces or headjoints or barrels or…) and to find one that really has a great sound! It’s a rite of passage for the young woodwind player, trying out a parade of shiny new possibilities, surrounded by parents, a private teacher, friends, and a salesperson with dollar signs in their eyes. “That one has such beautiful tone!” everybody will sigh.
I suggest that you do not buy that one.
“Good” tone is a fluid, fleeting thing. That clarinet might have better tone than a half-dozen of the same model because its pads currently leak less than the others. That mouthpiece might sound like a winner because the reed you brought with you happens to mate with it better at the moment.
And your tone will shift as you adapt to your purchases. That new piece of gear might make you sound like somebody else right now, but as you get accustomed to it you’ll start to sound like you again. (Don’t like sounding like you? Develop your tone concept.)
Rather than splitting hairs about tone, break out a chromatic tuner, or, better, a drone, and pick out the one that is easiest to play in tune. Bring along a teacher or professional colleague who has high-level proficiency on the instrument, and have them listen and watch the tuner while you play, then play while you listen and watch the tuner. (This is especially crucial if you are a student-level player!)
An instrument or accessory with great tone but poor pitch will be a constant exhausting struggle to play in tune, and its problems are harder to fix in the repair shop. Gear with rock-solid pitch will do a fair amount of the work for you, and “its” tone (your tone) will improve with practice, listening, and some TLC from a good technician. Shop with your priorities in order, and you will get an instrument that will serve you well for many years.