Both concepts feature a comprehensive list of "conceptual and aftermarket" parts, in keeping with the theme of the SEMA show. The MX-5 Speedster takes its inspiration from speedster-style cars from the 1950s, while the Spyder is a modern interpretation of the classic look.
The MX-5 Spyder's cabin features handmade leather interior trim elements, while its silver paint, passenger seat cover and rear deck are bespoke. The concept sits on 17in alloy wheels and includes carbonfibre exterior trim.
The MX-5 Speedster’s approach, meanwhile, is that of saving weight. Most notable among the changes is the absence of a windscreen, with a lighter wind deflector featuring in its place. The concept has also been lowered by 30mm thanks to new adjustable suspension.
The rear deck of the Speedster is occupied by roll bars that blend into buttresses on the bootlid, meaning that the Speedster is a full-time open-top car. Mazda says it has replaced the standard car's doors and seats with new units made from carbonfibre, as well as fitting custom 16in alloy wheels. The concept weighs in at 973kg - significantly less than the 1057kg of the standard MX-5. The Spyder weighs in at 1043kg. Both cars are powered by the 2.0-litre engine offered in the standard MX-5.
Both cars follow the same lightweight approach as the MX-5 Superlight that was first revealed at the 2009 Frankfurt motor show, although Mazda is keen to emphasise that the two cars are “two vastly different takes on the fourth-generation MX-5”.
Mazda design manager Ken Saward said: "Both MX-5 Spyder and MX-5 Speedster are uncompromising designs that highlight the core strengths of MX-5."