There are 2 main factors besides tilt wich should be considered .
1. Shape and size of diamonds ( deflectors) and their number.
Deflectors are there to " randomise" orbits that ball takes . Ball may beat directly the diamond and go right to the numbers , or may do long orbit before arriving to the numbers. In these 2 cases results may be very different. Think about it as change in position of your target. If you look to roulette as a clock face, change in 1 hour position in ball beating numbers will add 3 pokets difference + rotor moviment during additional time that ball takes to bridge this 1hour position extra. Obviously in 1 hour position change we may ignore rotor moviment, but if ball travel much more then one hour position , additional rotor moviment can be considerable. If tilt effect is present, additional distance ball make ( due to longer orbit) may be compensated by less time ball takes to arrive to the diamond. That's why in many cases is more productive to chart prediction- outcome, instead of predict to the diamond and then add most common scatter ( ball jumps).
2. Size of ball in relation to the high of poket separator.
I'll will not populate much on this one... every case is different, but consider to remember type and size of the ball while taking data and later playing. Keep your eyes open, casinos are full of tricks. Different size of ball will produce different results. Different material of ball may and often will produce difference as well.
On my wheel, for example, another ball is like entirely another wheel.
Ones determined and registered type of ball and type of deflectors , need to determine how playable is the wheel.
For one pin ( dominant diamond) wheel , almost any conditions are OK. To qualify for 1pin wheel, ball should strike same diamond at least 4 times out of 10 ( if diamonds are massive and actually stop the ball) , or 6 out of 10 times it should arrive to same drop zone .
For 2 pin wheel , ball should drop 7 times out of 10 on the same half of wheel. Or 8 out of 10 to strike 2 opposite diamonds.
When scouting for the new wheel, remember that in short run it can be anything, test of 10 spins is just to prequalify the wheel. Then need to confirm observations with posterior data taking.
Other things wich help is to look ball wich don't jump much. Beware however, normally casino start to use such a ball when wheel start to have problems ( bias). So pay atention and collect 2- 3 sessions of data before playing for serious money.
Collect diamond hits separately for each direction. Consider ball going other direction as different wheel all together.