In my humble opinion, neither has good suspension, the design is 50 years+ old, both suffer from camber problems associated with a swing axle. The Beck car uses VW torsion bars and spring plates. The Vintage uses trailing arms and coil over shocks. Both have the same problem and the design should be changed to the IRS. Vintage takes about a year to make and deliver a car, Beck can do it in 8 weeks. Vintage claims that their frame is more sturdy and probably is however, as many have stated, neither Vintage or Beck will hold up in a T-bone crash. Both are considered to have just a little more protection than a motorcycle. I drove both cars and didn't really see a big difference in suspension. Remember, both have VW front ends and both have swing axels. I subsequently decided to buy a used Beck from a former member who lives in Alabama and I'm having the car transported back to California. Back in the 60's many aftermarket producers had such items as camber compensators, axel limit straps, (keeps the axels from tucking under and rolling the tires on their outside edges) All of these items work but IRS is really the answer.
Both Beck and Vintage are located in Calif. Beck is in Baldwin Park and Vintage in Orange.