...
You have a good point.
And it is nicely tinned, too. (rimshot!)
Okay, more seriously - I've used both TINA and LTSpice most recently. TINA is a decent enough program for analog and digital circuits and has a good selection of ICs and components built-in whereas LTSpice is a surprisingly capable program for switch-mode converters, but not general purpose simulation nor is it particularly user-friendly (one step up from manually entering a netlist, really). LTSpice is much better at dealing with real world components (ie - parasitics in inductors, capacitors, transformers, IGBTs, MOSFETs, diodes, etc.). You can get real leakage inductance spikes, ringing, etc., with LTSpice, whereas TINA (and many other similar PSpice derivatives) tend to rely on ideal components, sometimes exclusively.