As everyone says, depends on what you are trying to do. For all interactive/exploratory analysis, for statistical graphics, for more advanced statistics, for m

As everyone says, depends on what you are trying to do. For all interactive/exploratory analysis, for statistical graphics, for more advanced statistics, for most statistics-related research work in general, I would definitely pick R out of these two. If statistics is only a small part of the application, if you already know exactly what you have to do (i.e. no data exploration), if you have to do a lot of web/text processing -- probably Python. Also, check which one has more/better packages related to what you are doing. For some stats projects I would go with something else entirely though.