Aspect-oriented model (AOM) composition techniques are responsible for expressing crosscutting relationships between aspect and base models. However, given their growing heterogeneity, it is particularly hallenging for designers to both objectively assess them and take decision on which is the best according to their supported composition facilities. This work provides a systematic comparison of representative AOM composition techniques. For this purpose, we propose a set of proposed evaluation criteria: the model composition process followed; the manner of matching the input models; the type of composition strategies used; the manner of assessing the composition results; and how the techniques address conflict resolution. Such criteria enable us to pinpoint the commonalities and differences as well as strengths and shortcomings of the three studied techniques.