Lacs and FSRQs are needed to reach a firm conclusion.

The nuclear component
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The average absolute magnitude of the fitted nuclear component for the clearly resolved BL Lacs is M(H) = –25.7$\pm$1.7. On the other hand, the FSRQs have much brighter nuclear component (M(H) = –29.7$\pm$0.8; KFS98). This difference in the strength of the nuclear component is also more evident considering the nucleus/galaxy luminosity ratio L(nuc)/L(gal) in Table 2. None of the low redshift BL Lacs (or the RGs from Taylor 1996) have L(nuc)/L(gal)$\geq$10, whereas about half of the FSRQs are above this limit (KFS98). From Figs. 5 and 6 it is clear that the host galaxies of the various samples considered here are not dramatically different in intrinsic luminosity, especially if cosmological evolution is taken into account. Therefore, this difference suggests that FSRQs exhibit a nuclear component which is systematically brighter than that of the low redshift BL Lac objects, possibly due to either intrinsically higher luminosity or a larger Doppler beaming factor. While this result disagrees with the current unified models of AGN, further observations of larger and unbiased samples of BL Lacs and FSRQs are needed to elucidate this point.

Conclusions
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In this paper we 