Reach is more than a scale number
Try the bass on a strap at your intended playing height. Notice the reach to the first few frets without pulling the neck toward you. Two instruments with similar scale lengths can position the nut differently because the body, bridge and strap-button locations differ. A shorter scale is therefore a useful shortlist feature, not a complete ergonomic assessment.
Check seated playing as well. The body may rest differently on your leg than it hangs on a strap, changing the position of both hands. Play a slow pattern across adjacent frets and then move higher up the neck. If you are new to bass, ask a teacher to check the fingering rather than forcing a guitar-style stretch that may not suit the passage.
Compare string feel under similar conditions
For comparable strings at the same pitch, scale length contributes to tension. In practice, gauge, construction and setup also vary. Ask what strings are installed on each bass and whether the action has been checked. A stiff-feeling instrument may not be telling you about scale alone.
Listen to the notes you expect to use, including the lowest string, at a normal playing level. Avoid comparing one instrument through a bright boosted amplifier setting and another through a muted preset. The point is to identify the response and feel you prefer, not to make a general ranking of short and long scales.
Check replacement-string availability
String packages use scale categories, but the required winding length also depends on how the string reaches the bridge and tuner. Through-body routing can add length beyond the vibrating scale. D'Addario defines its bass string sizing using the distance from the ball end to the taper, illustrating why the instrument's nominal scale is not the only measurement to check.
Before buying an unusual-size bass, identify a compatible replacement set in the tuning and construction you want. This is especially useful for extended-range or specialized instruments. A comfortable bass is less convenient if every restringing requires uncertain substitutions.
Finish the audition by checking weight and balance for several minutes. Your fretting hand should not have to serve as a permanent support for a falling neck. The best choice combines manageable reach, a stable playing position and a string setup you can maintain, rather than winning on one specification in isolation.
