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We compare the transmission performance of 112-Gb/s POLMUX-QPSK modulation over large-A_eff Pure-Silica core fiber and SSMF using EDFA-only amplification. The higher nonlinear threshold of the large-A_eff Pure-Silica core fiber allows for a 55% increase in transmission distance. By using back-propagation an additional 10% increase is observed. In case spans with equal length for both fiber types and two splices per span only would have been used, resulting in a lower span loss for the large-A_eff Pure-Silica core fiber, the total increase grows to 85%.