Of course
Example both a mezuza and sefer Torah have kedusha, yet they are not equal.
both Tefilin shel yad and shel rosh have kedusha, but again not equal. Practically this has reclassification, for example starps for tefilin shel yad can be elevated to shel rosh but not the reverse. Maalin bekodehs velo moridin, we go up in levels of kedusha – holiness but not down