When used as a title, or something similar, the two phrases can have overlapping meanings. However, when used in complete sentences, the two phrases are typically used quite differently.
A year-end review is a review of something held at the end of the year. The year in review could be used as the name of this year-end review, but it can also simply be a phrase describing the period (one year) that is being reviewed.
Here's an example of year in review from 1888, which is one of the earliest uses Google Books can find:
Statement X is a summary of commitment by courts and counties for the year in review
Annual Report of the Commissioners of Prisons - vol 17
Here's an even stronger example from 1897:
The reports of the directors, consulting engineer, and manager, taken in conjunction with the financial statements, make you acquainted with the work accomplished during the year in review.
African Review - vol 12
Particularly in that last example, it would make little sense to interpret that sentence as referring to the work accomplished during the year-end review. Much more likely, the author means the work accomplished during the year which is being reviewed.
And checking the other possibility, that year-end is somehow a corruption of year in, here's a 19th century example of year-end review that cannot be understood as year in review:
A copy of the year-end review prepared especially for our employees has been enclosed...
Corporation Annual Reports to Shareholders
