The decision of whether to buy the Porsche Boxster or Cayman S has just become harder, thanks to the arrival of the new GTS models.

Arguably, the Cayman is a well-rou to view more photos in its base form, so when Porsche decides to up the ante with a hardcore GT version everybody stops to listen.

And while these are the very first spy shots we have of the coupe that will likely wear the Cayman GT4 moniker, it looks like Porsche is in an advanced stage of testing – so much so, that we wouldn't be surprised if the Germans revealed the car as early as this fall at the Paris Motor Show.

According to Porsche's GT model tradition, it should be a higher-performance model that combines excellent trackday abilities with acceptable comfort and refinement levels to make it useable as an everyday car.

What we can see from these pictures is the new styling and aerodynamics package with an extended front lip spoiler, an additional air inlet in front of the hood, a fixed rear wing, a rear bumper with a diffuser and twin pipes similar to that used on the GTS, plus different wheels and huge brakes on all corners.

We can't see what's hiding under the sheetmetal, but rumor has it that the Cayman GT4 will sport a flat-six with a larger displacement than the GTS at 3.6-liters and an output of around 360-horses that would place it just about the base 911 Carrera. Suspension tweaks are to be expected as well. Whether it will be offered exclusively with a seven-speed dual clutch transmission or if Porsche will give the option of a manual gearbox, remains unknown at this point.

The Boxster S paid a visit to the Porsche Exclusive customization shop and this is what the German firm's designers came up with for their two-seater roadster. It's not a limited edition model, but rather a showpiece to inspire buyers to design a bespoke version of their own cars.

On the outside, the Boxster S is finished in the Porsche Exclusive Rivera Blue with the rear side air intakes, exterior mirror lower trims, headlight cleaning system covers, model designations and alloy wheels (partially) painted in black.

The car was specified with the SportDesign package and the Sport Chassis option that lowers the ride height by 20mm (0.8 inches).

You'll find the same color theme in the interior with the two-tone color sport seats that also feature the Porsche Crest embossed on headrests and seat belts in Silver Grey.

Other options ticked include the extended leather package for the top part of the dashboard and door panels, aluminum pedals and footrest, brushed aluminum trim accents, and custom illuminated door sill guards in stainless steel.

We've said that both the Porsche Boxster and Cayman are the best sports cars Porsche makes - with the new, driver-focused GTS models, we can finally decide which is the winner.

Unlikely to happen

Independent car designer X-Tomi Design from Hungary has envisioned a rugged-looking Porsche Cayman dubbed "Safari."

Towards the end of last year there was a rumor about a 911 off-road Safari concept but it didn't materialize. The car was supposed to be a spiritual successor of the 1978 911 SC Safari rally car based on the 991 Carrera 4S and equipped with a raised suspension, chunky tires and underbody cladding.

Now, X-Tomi Design has envisioned a Safari version of the smaller Cayman featuring the same ingredients: all-wheel drive system, raised suspension, beefier tires, plastic body mouldings and underbody protection.

It's highly unlikely Porsche is working on such a Cayman derivative since these days they are busy cooking up a range-topping GT3/GT4/R version which will come out in the next three years.