Personally for the brands that I've played I found the strings spacing a bit tight compared to the ukulele. Its string space is more like the steel string guitar. Should be more like the classical guitar.
Cordoba Guitars & Ukuleles Manufactures
Founded in 1997, Cordoba seeks to guide the evolution of the nylon string guitar, blending traditional craftsmanship of the early master luthiers with modern developments. Inspired by the organic beauty and honesty of acoustic instruments, every Cordoba is lightweight, responsive, and a direct descendant of the Spanish tradition. CÃ³rdoba continues to challenge the definition of the acoustic guitar without sacrificing the authenticity of its heritage.
Ko Aloha Ukulele Luthiers
KoAloha is proud to be regarded and recognized as one of the premier ukulele builders in Hawaii. Founder, Alvin S. Okami, has been called by many a modern day “Renaissance Man.” He is an inventor, an innovator, a composer/arranger, a singer, an accomplished oboist, an industrial designer, graphic designer, and overall brilliant conceptual and spontaneous idea man.
Gretsch Guitars Manufactures
Since 1883, when 27-year-old Friedrich Gretsch founded his little shop in Brooklyn, N.Y., making banjos, drums and tambourines, The Gretsch Company has grown to produce some of the world’s greatest drums and guitars over the span of four generations. With its emphasis on hand-craftsmanship and commitment to quality, Gretsch has pioneered new designs and manufacturing techniques, winning endorsements from some of the music industry’s most respected artists, including Chet Atkins, Bono, Charlie Watts, Neil Young and Phil Collins.
Yamaha Guitars Instruments
Yamaha Corporation (ヤマハ株式会社 Yamaha Kabushiki Gaisha?) (TYO: 7951) is a Japanese multinational corporation and conglomerate based in Japan with a very wide range of products and services, predominantly musical instruments, electronics, motorcycles and power sports equipment.