  Multi-gap Resistive Plate Chambers (MRPCs) with multi-strip readout are
considered to be the optimal detector candidate for the Time-of-Flight (ToF)
wall in the Compressed Baryonic Matter (CBM) experiment. In the R&D phase MRPCs
with different granularities, low-resistive materials and high voltage stack
configurations were developed and tested. Here, we focus on two prototypes
called HD-P2 and THU-strip, both with strips of 27 cm$^2$ length and
low-resistive glass electrodes. The HD-P2 prototype has a single-stack
configuration with 8 gaps while the THU-strip prototype is constructed in a
double-stack configuration with 2 $\times$ 4 gaps. The performance results of
these counters in terms of efficiency and time resolution carried out in a test
beam time with heavy-ion beam at GSI in 2014 are presented in this proceeding.
