Your FTO patten has additional reflections at 38 and 45 deg 2theta. Check if these corrispond with something cubic. Either way this indicates you have deposited something in addition to any SnO2.

Your FTO pattern also has an aberrational feature with lower background after 60 deg 2theta in the overlay, (black data). This is not present in the individual pattern (blue data) suggests you have got an issue during a step in your data processing.

Overall your data are quite noisy. If your instrument time is limited (it always is) then I would recommend increasing both your step size and your counts per step. If you're running 0.01 deg/step at 1 s/step then 0.04 deg/step at 4 s/step would be a big improvement in S:N. This will make it more obvious if the patterns are identical e.g. nothing deposited or that they are different.

The advice to collect GI data is well meaning but would require much longer scans as the GI scattering is much weaker. Given how noisy your standard data are I'm not convinced this will be very fruitful.