Sony on Monday announced that its new Xperia Z4 is going on sale outside of Japan for the first time next month, only it won’t be known as the Xperia Z4. Instead, it will be named the Xperia Z3+, but its physical design and specifications remain unchanged.

The Xperia Z3+ is essentially a slightly improved Xperia Z3. It has the same 5.2-inch display with 1080p resolution, the same 20.7-megapixel camera, and a very similar look that comes in the same color options as its predecessor — as well as a new aqua green option.

However, the Xperia Z3+ is slightly slimmer than the original Z3 at 6.9mm (vs. 7.3mm), which means a slightly smaller 2,930mAh battery — and while it is still water-resistant, Sony has been able to do away with the fiddly flap that covered its micro-USB port.

The Xperia Z3+ also boasts the latest Snapdragon 810 processor with Adreno 430 graphics, 3GB of RAM, and a microSD card slot. It ships with Android 5.0 Lollipop out of the box.

If you already have an 8-month-old Xperia Z3, the Z3+ isn’t going to look like much of an upgrade — not even for hardcore Sony fans.

That could make it difficult for the Xperia Z3+ to compete against the rest of 2015’s flagships — particularly the Galaxy S6 and the LG G4, which boast sharper Quad HD displays. But the Xperia Z3+ does have the upper-hand when it comes to water-resistance.

Sony hasn’t confirmed how much the Xperia Z3+ will cost yet, but it will be available globally in June.