Which is better, Jiangsu Tianrui or Shenzhen Sifan Instruments?

This question depends on how to compare. First of all, Tianrui do this industry than Sifan Instruments earlier, the product line is more rich, the product is not only do fluorescence spectrometer this piece, but on the other hand, this is also a disadvantage, too many products, focus is not good to control, but also very difficult to make each product system are the best. Xifan Instruments is only to do fluorescence spectrometer this type of product, including precious metal detector and RoHS detector, focus point better, so the performance of the product to enhance the more powerful point, so, but on the fluorescence spectrometer this piece, Xifan Instruments, may be a better performance of some of the instruments, this is some personal ideas in this industry, do not like do not spray, thank you!