The case of the Czech republic and the Slovak republic

The czech and the slovak nations had a similar history for more than a century, and the attempt to coexist in just one common state definitely failed in autumn 1992, when the czech Prime Minister Václav Klaus and the leader of the main slovak party HZDS, Vladimír Meèiar, came to the conclusion that the break-up of the integrated republic would be the best solution to the long-time internal problems. Consequently, on the 1st January 1993 two different countries emerged: the czech republic and the slovak republic.
Today, both of the Republics are members both of NATO and the EU; nevertheless the evolution of the former sibling countries has been slightly different. The czech republic's passage from the period of 40 years of subordination to the USSR into a functional democracy was less painful than the one Slovakia had to go through. The Czechs became members of NATO in 1999, whereas the Slovaks were not incorporated in the first wave of enhancement. Later on, when the negotiation process for the admission of the czech and slovak Republics to EU grew near to its end, Slovakia confronted various problems which led to discussions about its preparedness. But finally, both of the countries became members of the EU on the 1st May 2004 during the first wave of enlargement.
When taking into consideration the fact that the two countries had a common past and that they have gone through a long process of self-determination, we may suppose that the evolution of the political positioning of the two countries would also be similar. In spite of all this, we may find today two rather different systems of political culture, of party divisions and also of political struggle in the czech republic and slovak republic. Today, when talking about the further European enlargement and more about the possible admission of Turkey in the future, the two countries and their respective political parties have distinct points of view. From what is said below it may be possible to conclude that the czech republic had a more positive point of view about the European Union and it was more keen on entering it, whereas Slovakia stuck to its long-established good relationships with the USA and orientated its foreign politics rather to the Anglo-Saxon world. Meanwhile it is clear that after entering the EU, both of the former members of Czechoslovakia, who are now independent countries, must have expressed their opinion about the boundaries of the new allied Europe, about the further enlargement, and of course also about the question of Turkey. And surprisingly these opinions have not turned out to as different as expected in the two countries.
Consequently several questions as to why this significant division has happened may emerge: are the systems of political parties already divided by definition (because of different political background, socio-cultural beliefs or values); are there the same differences of opinion regarding the attitude to the EU and also Turkey in the czech and in the slovak republic, or may we also note any internal differences between the two party systems?