Evolution does not deal with the origin of life. Although this may not have an adverse impact on an empirical model, since these are only dependent on the data field which evolution focuses on, the question becomes, can this starting point have an impact on the reality behind evolution?
For example, say we did a thesis on the evolution of the automobile. Instead of starting in 1769 (steam powered) when it all began, we start our thesis in 1920. We can still draw a curve from 1920 to the present. But, will these two models (1769 to present, and, 1920 to present) be the same?
I would guess there will be differences. The reason is, the earliest thinking impacts the continuity of the future, since science, technology and knowledge builds upon itself. If you don't know the past, you will have to assume something but out of the context of the times.
For example, at the very beginning of abiogenesis, we had water as the majority component. Organics had this constant then and still now. Modern cells have more organic but water is still the majority chemical. Like natural selection certain things will work out better than others within water because of surface tension, for example. If we come in at replicators we can ignore this scaffolding and assume anything is possible, randomly. With the scaffolding of water, this is not true, due to energetics being different for different situations.