question about homologous binding motifs

Question

[kanwarjag]

I have identified a binding motif from Chipseq data. Now I want to see the homology / match of the letters in another motif identified for a different factor. What is the best way (test) to state that two motifs are similar/ homologus, I can see number of motif letter matching in both motifs. Will that be sufficent I recognize in general we take a motif and question it into JASPER or other datasets. However it is not identified in such criteria and is not in such databases. These are two motifs from mouse genome.

Thanks for any pointers.