The important thing is the intensity ratio between two important peaks. What i understand understand from the picture is your two spectra are seen the same.
The size of the FTIR peaks shows the amount of bond existing in the material. But the peaks in different positions should not compare with each other. You can compare the FTIR peaks of similar materials (as you in your case). If you see peak intensity is increase, then you have more of that particular type of bond. You need to make sure that the peak position is at the sample wavenumber. Any big shift in either direction tends to imply that some interaction has occurred. In addition, If the peak shape is similar, then its pretty much just more of that particular type of bond. However if the peak has broadened, then it could mean that some interaction has occurred (usually hydrogen bonding interaction).
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