The Piper PA-46 is a single engine prop aircraft, that comes in piston and turboprop versions. Especially the turboprop variants are similar in appearance as the TBM series. It can be distinguished from them mainly by the larger cabin windows and engine cowling.
Piper Aircraft was one of the companies that tried to bring a single engine bizjet on the market. While the concept aircraft has flown, the development was stopped before any production aircraft (to be named Altaire) were built. It is also a one-off aircraft in terms of external appearance: the jet engine is mounted in the tail like a DC-10/MD-11.
Piper PA-48 Enforcer
The PA-48 is a fully modernised version of the P-51 Mustang. Unlike its predecessor it has a turboprop engine with a large exhaust in the left front fuselage, tip tanks and lots of pylons under the wings.
With its stubby appearance and inward retracting three-strut main landing gear the Polikarpov I-16 is already remarkable. Even more typical is the big radial piston engine that is completely enclosed and only has holes in the front plate for letting cooling air in.
Punkari Condor 275 STOL
This home-built aircraft looks somewhat like a mix between a Stinson Voyager and a Bellanca Decathon. As far as we know only one was built and that is operated on floats. The tick wings with fences near the strut attachment points and the three blade prop maybe what you need to look at to recognise the Punkari Condor.
The PZL I-22 Iryda and Alpha Jet both have high, swept wings, semi-circular air intakes and space between the wings and the nacelles. The differences between them are more subtle: looking at the shape of the air intakes is the most obvious way of keeping them apart.
PZL TS-11 Iskra
The Polish Iskra jet trainer has two rectangular air intakes in front of the wings, just below the roots, leading to a single jet engine in the middle of the fuselage. The exhaust is under the fuselage, well before the cruciform tail.
In between the many high performance (turbo)prop training aircraft the PZL130 stands out due to its small size. The vertical stabiliser starts almost directly behind the tandem canopy. This fin has a curved leading edge on most versions, extending all the way to the trailing edge.
Quiet Short-Haul Research Aircraft
Under supervision of NASA a DHC-5 Buffalo was modified as Quiet Short-Haul Research Aircraft (QSRA). It has four jet engines on top of the wings, but for the rest it still resembles a Buffalo, including the long main landing attached to the wings. (photo NASA/WikiMedia)
Having a stand-up cabin in a light business jet means that the aircraft has a “fat” appearance. Moreover, the Premier has a long nose and comparatively small engines. Also the blunt, CRJ like tailcone is a clear recognition point.