The construction of the future tokamaks as ITER or DEMO highly depends on the prediction capability of the performance of the main operation scenarios. For this purpose, the validation of the main models available for the plasma simulation is mandatory. QuaLiKiz and TGLF are two of the newest and more sophisticated quasi-linear transport models derived from first principles. QuaLiKiz is based on an electrostatic gyrokinetic eigenvalue code, in the s-a geometry. In the version here used QuaLiKiz does not take plasma rotation effects into account. TGLF is a gyro-Landau fluid model. It contains two models for the E¥B rotation shear: the quench rule and the spectral shift model. It can run using s-a or Miller geometry. Both models take into account passing and trapped particles. These models contain many physics effects, and are fast enough to be inserted in integrated modeling codes (QuaLiKiz is however slower than TGLF and it is parallelized). They then can play a fundamental role in understanding and predicting the transport of plasma particle and heat in present and future machines. QuaLiKiz and TGLF have been first compared in their stand-alone versions. They show good agreement. Then they are used coupled in the CRONOS suite of codes to study heat transport in H-mode and hybrid plasmas of JET. The aim is to validate the models with the experimental data, to compare the results with the well known and faster even more approximated transport model GLF23 and to investigate the possible physical reasons of the resulting discrepancies.