The Nokia X, X+ and XL are powered by a 1GHz dual-core Qualcomm Snapdragon 8225 chipset with 512MB of RAM and 4GB of internal storage. In addition, you can expand the memory through microSD card slot with support up to 32GB cards. However, the Nokia X+ and XL get a bump in RAM to 768MB.
The Nokia X+ offers more memory and storage. It's priced at 99 euros and will be available in second quarter of 2014. The Nokia XL will be priced at 109 euros and be available in early Q2 2014.