Course Content difference between C_TBW45_70 (BI 7.0), C_TBW55_73 (BI 7.3) and C_TBI30_73 (BI 7.3)

Question

At the face of it the syllabus for BI 7.0 version certification: C_TBW45_70 is entirely different - notice the different course codes - from the BI 7.3 version certification exams - which are C_TBW55_73 (BackEnd BW) and C_TBI30_73 (FrontEnd BI-Reporting). Also BI 7.3 has introduced BODI and BO parts to it's curriculum. Looks like it has also reduced BW material a lot.
Q1. BW 7.3 may have significantly changed with introduction of HANA database under the hood of BW, but fundamentally BW7.3 should be the same as BW 7.0, so why such a drastic change in the syllabus of both the exams?
Q2, Is it true that BW7.0 certification exam C_TBW45_70 has more extensive coverage of BW concepts than C_TBW60_74 certification exam
Q3. For a person certified in C_TBW45_70, does he have to undertake all additional courses of  C_TBW55_73 to get certified for BW 7.3. That's like prepairing everything afreash.
Q4. For a person certified in C_TBW45_70, does he have to prepair for both certifications C_TBW55_73 and C_TBI30_73 to get certified in BW7.3
C_TBW45_70 Coverage
TBW10: BW Enterprise Data Warehousing
TBW20: BI Reporting & Query Design
TBW41: BI Extraction with UDI & XI & APD
TBW42: BI Advanced Enterprise Data Warehousing & Reporting
TBW45: BI Integrated Planning
--Notice how fundamentally different the coverage of C_TBW55_73 is from C_TBW45_70. Looks like SAP has reduced BW coverage in BW7.3 certification to compensate for BO and BODS.
C_TBW55_73 Coverage:
TBW10: BW Enterprise Data Warehousing
TBW30: BW Modelling & Implementation
TBW50: BW Data Acquisition
TBW55: SAP Business Objects Reporting Clients & information
BOE315: SAP BO Enterprise XI 3.0/ XI 3.1 Administration
BODS15: SAP Business Objects Data Integration 4.0
C_TBI30_73 Coverage:
TBI10: BW Query Design & Analysis
TBI20: Web Application Designer & Datawarehousing Fundamentals
TBI30: SAP Business Objects  Business Intelligence with SAP BW
BW307: BW Web Application Designer
BW308: BW Protal Integration
BW309: BW Workbook design with BEx Analyzer

Answer 1

SAP BI is the latest version, SAP removed BW 3.5 certifications long back.
Major Difference between SAP BI 7.0 and SAP BW 3.5
1) Administrator Workbench is renamed as Data Warehousing Workbench.
2) There are additional modeling options available at left hand side panel in transaction RSA1 as shown below. The additions are 'DataSources' and 'Open Hub Destination'.
3) The functions of the InfoPackage tree are fully covered by process chains.
4) Process Chains are used instead of Event Collector.
5) The 'Remodelling' transaction help you add Key Figures and Characteristics in a Infocube while handling historical data effectively.
6) Infocubes can be included in Infosets.
7) Transformation is used instead of update and transfer rules.
8) ODS objects have been renamed as DataStore Objects.
9) You can access objects till InfoPackage directly from InfoCube as shown below.
Curriculum:
http://www.sap.com/services/education/certification/curriculum.epx?context=%5b%5bNW04s_BI_SC_BASIC%5d%5d%7c
TBW10 (BI – Enterprise Data Warehousing)
TBW20 (BI – Reporting & Query Design)
TBW41 (BI – Extraction with UDI & XI and APD)
TBW42 (BI – Advanced Enterprise Data Warehousing & Reporting)
TBW45 (BI – Integrated Planning)
All the certification materials are copyright of SAP and this is not freely available.
Search in google it and you will find lots of downloads
Regards,
Phani