Fujifilm X100T has a 16.0MP APS-C (23.6 x 15.8 mm ) sized CMOS X-TRANS II sensor and features EXR Processor II processor. On the other hand, Fujifilm X10 has a 12.0MP 2/3" (8.8 x 6.6 mm ) sized CMOS X-TRANS I sensor and features EXR processor.
Below you can see the X100T and X10 sensor size comparison.
As seen above, Fujifilm X100T has a 6.4x Larger sensor area than Fujifilm X10. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.