Tolerance to benzodiazepines is across the board - you become tolerant to just about every effect benzos produce, muscle relaxant properties included. However, the rate of tolerance to the sedative, muscle relaxant, and anticonvulsant properties of benzos develop at a faster rate than does tolerance to the anxiolytic effects.
Benzos which have a higher activity at the alpha 1 subunit of the GABA(A) receptors are the hypnotics. Modulation of the alpha 1 subunit is responsible for sedation, motor-impairment, bad balance (ataxia), amnesia, and reinforcing behavior. So this would mean that tolerance occurs at a faster rate with hypnotics and psychological dependence is more likely to occur with hypnotics also.
Benzos like clonazepam, lorazepam, bromazepam, diazepam and alprazolam have higher activity at the alpha 2 subunit. This one is responsible for disinhibition and anxiolysis. These benzos are active at the alpha 1 subunit too, but to a lesser degree than benzos like nitrazepam, temazepam, triazolam, or flunitrazepam.