It will work but not the best reception possible
Xm antennas are designed specifically for reception from Rock and Roll on the East and West Coast which lie at the equator. Because of their low latitude location, the antennas are designed to receive signals at low angles. This is also due to the fact that they are in stationary orbit and only move with the rotation of the earth. Since Sirius 1, 2, and 3 are in an eliptical orbit and constantly move in a figure 8 pattern from the East, to the North, and back to the west, the Sirius antennas require more angles of reception from low to high. Xm antennas are designed only for low angled reception. When the satellites are around high angles, you may or may not get a signal with an XM antenna.